Across
1
Unit of energy
3
Substance with pH below 7
4
Reddish electrical conductor
7
Natural satellite of Earth
8
The Red Planet
9
Ball of burning gas in space
Down
2
Element found in all living things
4
Solid with repeating atomic pattern
5
Fourth state of matter
6
Tectonic landmass section
8
Measure of matter in an object
10
Hottest planet in solar system